Insecure DLL loading in Cisco AnyConnect Secure Mobility Client - CVE-2021-1567
Published: June 16, 2021
Vulnerability identifier: #VU54177
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1567
CWE-ID: CWE-427
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the application loads DLL libraries in an insecure manner. A local user can place a specially crafted .dll file on system, if the VPN Posture (HostScan) Module is installed on the AnyConnect client, and execute arbitrary code with SYSTEM privileges.
The vulnerability affects Cisco AnyConnect Secure Mobility Client for Windows.
Affected software
Cisco AnyConnect Secure Mobility Client
How to mitigate CVE-2021-1567
Install updates from vendor's website.
Cisco AnyConnect Secure Mobility Client - update to 4.10.01075